unbundle 5.2.0

name: Release

on:
  push:
    tags:
      - "v*"
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag to release (example: v4.3.7)"
        required: true
        type: string

permissions:
  contents: write

jobs:
  publish-release:
    name: Publish GitHub release
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Resolve tag
        id: resolve_tag
        shell: bash
        run: |
          if [[ "${GITHUB_EVENT_NAME}" == "workflow_dispatch" ]]; then
            TAG="${{ github.event.inputs.tag }}"
          else
            TAG="${GITHUB_REF_NAME}"
          fi

          if [[ -z "$TAG" ]]; then
            echo "Failed to resolve tag"
            exit 1
          fi

          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
          echo "Resolved tag: $TAG"

      - name: Extract release notes from changelog
        id: notes
        shell: bash
        run: |
          TAG="${{ steps.resolve_tag.outputs.tag }}"
          VERSION="${TAG#v}"

          awk -v ver="$VERSION" '
            $0 ~ "^## \\[" ver "\\]" { capture=1; next }
            capture && $0 ~ "^## \\[" { exit }
            capture { print }
          ' CHANGELOG.md > RELEASE_NOTES.md

          if ! grep -q '[^[:space:]]' RELEASE_NOTES.md; then
            echo "No changelog section found for $TAG"
            exit 1
          fi

          echo "notes_file=RELEASE_NOTES.md" >> "$GITHUB_OUTPUT"

      - name: Create or update release
        env:
          GH_TOKEN: ${{ github.token }}
        shell: bash
        run: |
          TAG="${{ steps.resolve_tag.outputs.tag }}"
          NOTES_FILE="${{ steps.notes.outputs.notes_file }}"

          if gh release view "$TAG" >/dev/null 2>&1; then
            gh release edit "$TAG" --title "$TAG" --notes-file "$NOTES_FILE"
          else
            gh release create "$TAG" --title "$TAG" --notes-file "$NOTES_FILE"
          fi

      - name: Mark latest when appropriate
        env:
          GH_TOKEN: ${{ github.token }}
        shell: bash
        run: |
          TAG="${{ steps.resolve_tag.outputs.tag }}"
          LATEST_TAG=$(git tag --list 'v*' | sort -V | tail -n 1)

          if [[ "$TAG" == "$LATEST_TAG" ]]; then
            gh release edit "$TAG" --latest
          fi